CN217177316U

CN217177316U - Nut assembly and electronic expansion valve

Info

Publication number: CN217177316U
Application number: CN202220483043.XU
Authority: CN
Inventors: 詹少军; 陈灿锋
Original assignee: Zhejiang Dunan Artificial Environment Co Ltd
Current assignee: Zhejiang Dunan Artificial Environment Co Ltd
Priority date: 2022-03-04
Filing date: 2022-03-04
Publication date: 2022-08-12
Anticipated expiration: 2032-03-04

Abstract

The utility model provides a nut component and electronic expansion valve, nut component includes: a nut; the connecting plate is detachably sleeved on the nut, the connecting plate and the nut are in interference fit in the circumferential direction, and the connecting plate and the nut are in clearance fit in the radial direction. Adopt this scheme for connecting plate on the nut can be followed the radial movement of nut but can not follow the circumferential direction of nut, avoided among the correlation technique nut assembly at the in-process of packing into valve body subassembly, the nut simultaneously with connecting plate, valve body subassembly in footpath interference fit, lead to the condition of nut overspuning, be favorable to improving the axiality of nut and valve body subassembly, and can reduce nut assembly's machining precision, reduce the processing cost, improve nut assembly's production efficiency.

Description

Nut assembly and electronic expansion valve

Technical Field

The utility model relates to an electronic expansion valve technical field particularly, relates to a nut component and electronic expansion valve.

Background

The nut component of the electronic expansion valve in the related art, the connecting plate and the nut in the nut component are in interference fit in the radial direction of the nut, and in the process of installing the nut component into the valve body component, the connecting plate and the valve body component are also in tight fit usually, so that the nut is easily positioned in the radial direction, the coaxiality between the nut component and the valve body component cannot be ensured, the processing requirements of the nut component and the valve body component are high, and the assembly difficulty and the processing difficulty are high.

SUMMERY OF THE UTILITY MODEL

The utility model provides a nut component and electronic expansion valve to nut component's assembly.

In order to achieve the above object, according to an aspect of the present invention, the present invention provides a nut assembly, including: a nut; the connecting plate is detachably sleeved on the nut, the connecting plate and the nut are in interference fit in the circumferential direction, and the connecting plate and the nut are in clearance fit in the radial direction.

Further, the nut comprises a nut main body and a first limiting structure arranged on the nut main body, the connecting plate comprises a connecting ring and a second limiting structure arranged on the connecting ring, the connecting ring is sleeved on the nut main body, the connecting ring is in clearance fit with the nut main body, the first limiting structure and the second limiting structure are in radial clearance fit with the connecting ring, and the first limiting structure and the second limiting structure are in circumferential interference fit with the connecting ring.

Further, first limit structure is including setting up the spacing boss at nut main part outer wall, and second limit structure is including setting up the spacing groove at the connecting plate inner wall, and spacing boss is located the spacing inslot.

Furthermore, the limiting boss is provided with two first limiting surfaces and a first matching surface positioned between the two first limiting surfaces, and the limiting groove is provided with two second limiting surfaces and a second matching surface positioned between the two second limiting surfaces; the first matching surface is in clearance fit with the second matching surface, and the two first limiting surfaces are in one-to-one corresponding limiting fit with the two second limiting surfaces.

Furthermore, the two first limiting surfaces and the two second limiting surfaces are arranged in parallel, the distance between the two first limiting surfaces is L1, the distance between the two second limiting surfaces is L2, and L1-L2 is more than or equal to 0.03 mm.

Furthermore, the first matching surface and the second matching surface are arc-shaped surfaces which are coaxially arranged, the diameter of the first matching surface is d3, the diameter of the second matching surface is d4, and d4-d3 is more than or equal to 0.1 mm.

Furthermore, the maximum diameter of the nut main body is d1, the inner diameter of the connecting ring is d2, and d2-d1 is more than or equal to 0.1 mm.

Further, in the axial direction of the nut, the size of the limiting boss is larger than the thickness of the connecting plate.

Furthermore, the limiting boss is also provided with two guiding inclined planes, and the two guiding inclined planes are respectively connected with one ends, far away from the connecting plate, of the two first limiting planes.

Further, the nut main part is including the nut section, changeover portion, the linkage segment that connect gradually, and the nut still includes the limiting plate of being connected with the linkage segment, and the external diameter of linkage segment is greater than the external diameter of nut section, and the external diameter of limiting plate is greater than the external diameter of linkage segment, and connecting plate detachably cover is established on the linkage segment, connecting plate and limiting plate butt, and first limit structure is located the outer wall of linkage segment.

According to the utility model discloses an on the other hand provides an electronic expansion valve, and electronic expansion valve includes valve body subassembly and foretell nut component, and nut component is located the valve body subassembly.

Furthermore, the electronic expansion valve also comprises a guide sleeve, the guide sleeve is arranged in the cavity of the valve body assembly, the nut is provided with a positioning hole, one end of the guide sleeve penetrates into the positioning hole, and the outer wall of the guide sleeve is in interference fit with the inner wall of the positioning hole.

Further, the valve body assembly comprises a valve cover and a valve seat which are connected with each other, at least one part of the nut is located in a cavity of the valve cover, the valve seat comprises a seat body and a valve port piece which are connected with each other, the seat body is connected with the valve cover, the valve port piece is provided with a positioning boss, the positioning boss penetrates into one end, far away from the nut, of the guide sleeve, and the positioning boss is in interference fit with the guide sleeve.

Use the technical scheme of the utility model, a nut component is provided, include: a nut; the connecting plate is detachably sleeved on the nut, the connecting plate and the nut are in interference fit in the circumferential direction, and the connecting plate and the nut are in clearance fit in the radial direction. Adopt this scheme, make the connecting plate on the nut can follow the radial movement of nut but can not follow the circumferential direction of nut, the in-process of nut subassembly at the valve body subassembly of packing into in the correlation technique has been avoided, because connecting plate and valve body subassembly also closely cooperate, lead to the nut in the ascending location of radially, can not guarantee the condition of the axiality between nut subassembly and the valve body subassembly, the axiality of nut subassembly and valve body subassembly has been improved, the machining precision and the processing cost of nut subassembly have been reduced, the assembly degree of difficulty of nut subassembly has been reduced, the production efficiency of nut subassembly is improved.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural view of a nut assembly provided by an embodiment of the present invention;

FIG. 2 shows a schematic view of the nut assembly of FIG. 1;

FIG. 3 shows a top view of the nut of FIG. 2;

FIG. 4 shows a schematic structural view of a web in the nut assembly of FIG. 1;

fig. 5 is a schematic structural diagram of an electronic expansion valve according to another embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a nut; 11. a nut body; 111. a nut section; 112. a transition section; 113. a connecting section; 114. a limiting plate; 12. a first limit structure; 121. a first limiting surface; 122. a first mating surface; 123. a guide slope;

20. a connecting plate; 21. a connecting ring; 22. a second limit structure; 221. a second limiting surface; 222. a second mating surface;

30. a valve body assembly; 31. a valve cover; 32. a valve seat; 321. a base body; 322. a valve port member; 323. positioning the boss;

40. and a guide sleeve.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1-4, an embodiment of the present invention provides a nut assembly, including: a nut 10; the connecting plate 20 is detachably sleeved on the nut 10, the connecting plate 20 is in interference fit with the nut 10 in the circumferential direction, and the connecting plate 20 is in clearance fit with the nut 10 in the radial direction.

In this embodiment, make connecting plate 20 on the nut 10 can be along the radial displacement of nut 10 but can not follow the circumferential direction of nut 10 and rotate, the in-process of nut subassembly at the valve body subassembly 30 of packing into in the correlation technique has been avoided, because connecting plate 20 and valve body subassembly also closely cooperate, lead to the nut 10 at radial ascending excessive location, can not guarantee the condition of the axiality between nut subassembly and the valve body subassembly, the axiality of nut subassembly and valve body subassembly has been improved, the machining precision and the processing cost of nut subassembly have been reduced, the assembly degree of difficulty of nut subassembly has been reduced, the production efficiency of nut subassembly has been improved.

Specifically, the nut 10 includes a nut main body 11 and a first limit structure 12 disposed on the nut main body 11, and the connection plate 20 includes a connection ring 21 and a second limit structure 22 disposed on the connection ring 21, where the connection ring 21 is sleeved on the nut main body 11, the connection ring 21 and the nut main body 11 are in clearance fit, the first limit structure 12 and the second limit structure 22 are in radial clearance fit on the connection ring 21, and the first limit structure 12 and the second limit structure 22 are in circumferential interference fit on the connection ring 21. Set up like this, realize the spacing cooperation between connecting plate 20 and the nut 10 through the spacing cooperation between first limit structure 12 and the second limit structure 22, and directly set up first limit structure 12 on nut 10, second limit structure 22 directly sets up on connecting plate 20, has reduced first limit structure 12 and second limit structure 22's overall dimension when being convenient for process, guarantees nut component's miniaturization.

Specifically, the first limiting structure 12 includes a limiting boss disposed on the outer wall of the nut body 11, the second limiting structure 22 includes a limiting groove disposed on the inner wall of the connecting plate 20, and the limiting boss is located in the limiting groove. In this embodiment, the limiting fit between the first limiting structure 12 and the second limiting structure 22 is mainly designed to be the limiting fit between the limiting projection and the limiting groove, and the structure is simple, the processing is convenient, and the fit is reliable.

As shown in fig. 3 and 4, the limiting boss has two first limiting surfaces 121 and a first matching surface 122 located between the two first limiting surfaces 121, and the limiting groove has two second limiting surfaces 221 and a second matching surface 222 located between the two second limiting surfaces 221; the first engagement surface 122 and the second engagement surface 222 are in clearance fit, and the two first position-limiting surfaces 121 and the two second position-limiting surfaces 221 are in one-to-one position-limiting fit.

In this embodiment, through the clearance fit of first fitting surface 122 and second fitting surface 222, make connecting plate 20 can take place slight movement along the footpath of nut main part 11, through two first spacing faces 121 and two spacing faces 221 one-to-one spacing cooperation, make connecting plate 20 along the ascending rotation in circumference of nut main part 11 restricted, avoid appearing the condition that connecting plate 20 crossed the location, be convenient for to the machine-shaping of spacing boss and spacing groove, simple structure, the cooperation is reliable. Specifically, the two first limiting surfaces 121 and the two second limiting surfaces 221 are in interference fit with each other in a one-to-one correspondence manner.

Specifically, the two first limiting surfaces 121 and the two second limiting surfaces 221 are arranged in parallel, the distance between the two first limiting surfaces 121 is L1, the distance between the two second limiting surfaces 221 is L2, and L1-L2 is more than or equal to 0.03 mm. By the arrangement, the width of the limiting groove sleeved on the outer peripheral surface of the nut main body 11 is smaller than the width of the limiting projection on the nut main body 11, and the reliability of interference fit between the first limiting surface 121 and the second limiting surface 221 is ensured. Specifically, the situation that when L1-L2 is less than 0.03mm, interference magnitude between the limiting lug and the limiting groove is not enough to limit rotation of the connecting plate 20 along the circumferential direction of the nut main body 11 is avoided, and reliability of interference fit between the limiting lug and the limiting groove is guaranteed.

Further, the first matching surface 122 and the second matching surface 222 are arc surfaces which are coaxially arranged, the diameter d3 of the first matching surface 122 and the diameter d4 of the second matching surface 222 are, and d4-d3 is more than or equal to 0.1 mm. By the arrangement, the depth of the limiting groove sleeved on the outer peripheral surface of the nut main body 11 is larger than the length of the limiting bump on the nut main body 11, and the reliability of clearance fit between the first matching surface 122 and the second matching surface 222 is ensured. Specifically, the situation that when d4-d3 is less than 0.1mm, the gap between the limiting lug and the limiting groove is not enough to enable the connecting plate 20 to move along the radial direction of the nut main body 11 is avoided, and the reliability of the gap fit between the limiting lug and the limiting groove is ensured.

Furthermore, the maximum diameter of the nut body 11 is d1, the inner diameter of the connecting ring 21 is d2, and d2-d1 is more than or equal to 0.1 mm. The arrangement is such that the maximum radial dimension of the nut main body 11 is larger than the inner diameter of the connection ring 21, and the reliability of the radial movement of the connection ring 21 along the nut main body 11 is ensured. Specifically, the situation that when d2-d1 is less than 0.1mm, the inner side wall of the connecting ring 21 is tightly matched with the outer side wall of the nut body 11, so that the connecting plate 20 cannot move along the radial direction of the nut body 11 is avoided, and the reliability of clearance fit between the connecting plate 20 and the nut 10 is ensured.

As shown in fig. 1, the size of the limit projection is larger than the thickness of the connection plate 20 in the axial direction of the nut 10. By the arrangement, the limiting effect of the limiting boss on the connecting plate 20 can be guaranteed.

Specifically, the limiting boss further has two guiding inclined planes 123, and the two guiding inclined planes 123 are respectively connected with one ends of the two first limiting planes 121 far away from the connecting plate 20.

In this embodiment, through setting up two direction inclined planes 123, be convenient for to the direction installation of connecting plate 20, prevent that connecting plate 20 from taking place to collide with spacing boss in the installation and leading to the impaired condition of connecting plate 20 or spacing boss, prevent the unsafe condition of connecting plate 20 mounted position simultaneously, guarantee the reliability of connecting plate 20 installation.

As shown in fig. 1 and fig. 2, the nut body 11 includes a nut segment 111, a transition segment 112, and a connection segment 113 that are connected in sequence, the nut 10 further includes a limit plate 114 connected with the connection segment 113, an outer diameter of the connection segment 113 is greater than an outer diameter of the nut segment 111, an outer diameter of the limit plate 114 is greater than an outer diameter of the connection segment 113, the connection plate 20 is detachably sleeved on the connection segment 113, the connection plate 20 abuts against the limit plate 114, and the first limit structure 12 is located on an outer wall of the connection segment 113.

In the present embodiment, the connection plate 20 and the nut main body 11 are detachably connected. Through setting up connecting plate 20 and the 11 components of a whole that can function independently of nut body, the condition that need put into the connecting plate when having avoided carrying out the inserts to the nut subassembly among the correlation technique and moulding plastics has improved nut subassembly production efficiency, has avoided the unable secondary feed back of nut body 11 that has connecting plate 20 to use the condition simultaneously for nut body 11 can better secondary feed back use. And set up like this, avoided among the relevant art when the nut subassembly carries out the insert and moulds plastics that there is more overlap in the hookup location of connecting plate and nut because of technology reason, lead to the impaired condition of nut subassembly, improved the structural strength of nut subassembly. Specifically, the first position-limiting structure 12 is connected to both the connecting segment 113 and the position-limiting plate 114.

As shown in fig. 5, another embodiment of the present invention provides an electronic expansion valve, which includes a valve body assembly 30 and the nut assembly, wherein the nut assembly is located in the valve body assembly 30.

Specifically, the electronic expansion valve further comprises a guide sleeve 40, the guide sleeve 40 is arranged in the cavity of the valve body assembly 30, the nut 10 is provided with a positioning hole, one end of the guide sleeve 40 penetrates into the positioning hole, and the outer wall of the guide sleeve 40 is in interference fit with the inner wall of the positioning hole.

In this embodiment, the outer wall of the guide sleeve 40 and the inner wall of the positioning hole are in interference fit to ensure the coaxiality between the nut assembly and the guide sleeve 40. Meanwhile, by combining the arrangement, the situation that the nut 10 is positioned excessively due to the interference fit of the guide sleeve 40 and the nut 10 positioning hole and the interference fit of the connecting plate 20 and the nut 10 in the process of assembling the nut assembly into the valve body assembly in the related art is avoided, the coaxiality of the nut assembly and the guide sleeve 40 is improved, the processing precision of the connecting plate 20, the nut 10 and the guide sleeve 40 in the nut assembly is reduced, the processing cost is reduced, and the production efficiency of the nut assembly is improved.

Further, the valve body assembly 30 includes a valve cover 31 and a valve seat 32 connected to each other, at least a portion of the nut 10 is located in the cavity of the valve cover 31, the valve seat 32 includes a seat body 321 and a valve port 322 connected to each other, the seat body 321 is connected to the valve cover 31, the valve port 322 has a positioning boss 323, the positioning boss 323 penetrates through one end of the guide sleeve 40 away from the nut 10, and the positioning boss 323 is in interference fit with the guide sleeve 40.

In this embodiment, the positioning boss 323 and the guide sleeve 40 are in interference fit, so that the coaxiality between the guide sleeve 40 and the valve body assembly is ensured, and the interference fit between the guide sleeve 40 and the positioning hole is combined, so that the coaxiality between the valve body assembly and the nut assembly is ensured, and the reliability of the electronic expansion valve is ensured.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A nut assembly, comprising:

a nut (10);

the connecting plate (20), detachably the cover of connecting plate (20) is established on nut (10), connecting plate (20) with nut (10) interference fit in circumference, connecting plate (20) with nut (10) are in the footpath clearance fit.

2. The nut assembly according to claim 1, characterized in that the nut (10) comprises a nut body (11) and a first limiting structure (12) arranged on the nut body (11), and the connecting plate (20) comprises a connecting ring (21) and a second limiting structure (22) arranged on the connecting ring (21), wherein the connecting ring (21) is sleeved on the nut body (11), the connecting ring (21) and the nut body (11) are in clearance fit, the first limiting structure (12) and the second limiting structure (22) are in radial clearance fit in the connecting ring (21), and the first limiting structure (12) and the second limiting structure (22) are in circumferential interference fit in the connecting ring (21).

3. The nut assembly of claim 2 characterized in that said first stop structure (12) comprises a stop boss disposed on an outer wall of said nut body (11) and said second stop structure (22) comprises a stop groove disposed on an inner wall of said web (20), said stop boss being located within said stop groove.

4. The nut assembly of claim 3 characterized in that said stop boss has two first stop surfaces (121) and a first mating surface (122) between said two first stop surfaces (121), said stop groove has two second stop surfaces (221) and a second mating surface (222) between said two second stop surfaces (221); the first matching surface (122) is in clearance fit with the second matching surface (222), and the two first limiting surfaces (121) are in one-to-one corresponding limiting fit with the two second limiting surfaces (221).

5. The nut component according to claim 4, characterized in that the two first limiting surfaces (121) and the two second limiting surfaces (221) are arranged in parallel, the distance between the two first limiting surfaces (121) is L1, the distance between the two second limiting surfaces (221) is L2, and L1-L2 is more than or equal to 0.03 mm.

6. The nut assembly of claim 4 characterized in that said first mating surface (122) and said second mating surface (222) are coaxially disposed arcuate surfaces, said first mating surface (122) has a diameter d3, said second mating surface (222) has a diameter d4, and d4-d3 is greater than or equal to 0.1 mm.

7. Nut assembly according to claim 4, characterized in that the maximum diameter of the nut body (11) is d1, the inner diameter of the coupling ring (21) is d2, d2-d1 being 0.1mm or more.

8. The nut assembly of claim 4 characterized in that the dimension of the stop boss is greater than the thickness of the web (20) in the axial direction of the nut (10).

9. The nut component of claim 4, characterized in that the limiting boss is further provided with two guiding inclined planes (123), and the two guiding inclined planes (123) are respectively connected with one ends of the two first limiting planes (121) far away from the connecting plate (20).

10. The nut assembly according to claim 2, characterized in that the nut main body (11) comprises a nut section (111), a transition section (112) and a connection section (113) which are connected in sequence, the nut (10) further comprises a limiting plate (114) connected with the connection section (113), the outer diameter of the connection section (113) is larger than that of the nut section (111), the outer diameter of the limiting plate (114) is larger than that of the connection section (113), the connecting plate (20) is detachably sleeved on the connection section (113), the connecting plate (20) is abutted to the limiting plate (114), and the first limiting structure (12) is located on the outer wall of the connection section (113).

11. An electronic expansion valve, characterized in that the electronic expansion valve comprises a valve body assembly (30) and a nut assembly according to any of claims 1-10, the nut assembly being located within the valve body assembly (30).

12. An electronic expansion valve according to claim 11, further comprising a guide sleeve (40), wherein the guide sleeve (40) is disposed in the cavity of the valve body assembly (30), the nut (10) has a positioning hole, one end of the guide sleeve (40) penetrates into the positioning hole, and an outer wall of the guide sleeve (40) and an inner wall of the positioning hole are in interference fit.

13. An electronic expansion valve according to claim 12, wherein the valve body assembly (30) comprises a valve cover (31) and a valve seat (32) connected to each other, at least a portion of the nut (10) is located in a cavity of the valve cover (31), the valve seat (32) comprises a seat body (321) and a valve port member (322) connected to each other, the seat body (321) and the valve cover (31) are connected, the valve port member (322) has a positioning boss (323), the positioning boss (323) penetrates into an end of the guide sleeve (40) away from the nut (10), and the positioning boss (323) and the guide sleeve (40) are in interference fit.